package com.itheima.reggie.common;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理
 */
@ControllerAdvice(annotations = {RestController.class, Controller.class})
@ResponseBody
@Slf4j
public class  GlobalExceptionHandler {

    /**
     * 异常处理方法
     * @return
     */
    // 仅适用完整性约束
    @ExceptionHandler(SQLIntegrityConstraintViolationException.class)
    public R<String> exceptionHandler(SQLIntegrityConstraintViolationException ex){
        log.error(ex.getMessage());
        if(ex.getMessage().contains("Duplicate entry")){
            String[] split = ex.getMessage().split(" ");
            String msg = split[2] + "已存在";
            return R.error(msg);
        }
        return R.error("未知错误");
    }
    /*
    // 能适用所有数据库异常，需要自己判断情况
    @ExceptionHandler(SQLException.class)
	public R<String> exceptionSQLHandler(SQLException ex){
		log.error(ex.getMessage());
		if(ex.getMessage().contains("Duplicate entry")){
			String[] split = ex.getMessage().split(" ");
			return R.error("数据库异常,"+split[2]+"已存在");
		}else if(ex.getMessage().contains("Data too long")){
			// 数据范围超长
			return R.error("数据库异常，数据长度超过指定范围");
		}
		return R.error("未知错误");
	}
	*/

}
